A control method for automatic drill sending with constant pressure difference in oil drilling
A technology for automatic drilling and oil drilling, which is applied in the automatic control system of drilling, drilling equipment, earth-moving drilling, etc., to achieve the effect of improving efficiency, improving service life, and convenient operation and setting.
Active Publication Date: 2021-07-27
北京四利通控制技术股份有限公司
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Problems solved by technology
[0004] The object of the present invention is to provide a kind of constant pressure difference automatic drilling control method for oil drilling, thereby solving the aforementioned problems existing in the prior art
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[0046] During the construction of horizontal wells and extended-reach wells, real-time collection of basic data such as drilling bits, screw power drilling tools, and drilled ground formations is carried out, and they are transmitted into the algorithm model as basic data; the basic data Data processing is carried out by the above method, and the algorithm model is adjusted; the drilling tool is controlled to automatically feed the drill according to the output of the algorithm model, so as to realize the constant pressure difference feeding of the drill bit in the drilling well.
[0047]By adopting the above-mentioned technical solution disclosed in the present invention, the following beneficial effects are obtained: the present invention provides an automatic drilling control method with constant pressure difference in oil drilling, through the algorithm model, the standing pressure data can be collected in real time and converted into drilling pressure, By adjusting the mot...
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A constant pressure difference automatic drilling control method for oil drilling. First, an algorithm model is established. Based on the basic data collected by the input implementation, the torque on the bottom hole drill bit is calculated, and then the real-time pump pressure difference relationship on the ground is derived, and Through the historical data for machine bloody, adjust and optimize the algorithm model so that the output can meet the constant pressure difference drilling; finally, adjust the speed of the motor according to the output pump pressure difference to achieve the optimal control of the pressure difference, and finally realize Constant pressure difference automatic drilling. The method of the present invention is calibrated by pressure difference, and does not need to repeatedly move the drilling tool to correct the WOB benchmark, which can not only improve the efficiency, but also make the operation and setting more convenient; and it can be used without using additional downhole tools. Realizing the effective control of drilling pressure and torque of the drill bit can improve the service life of the mechanical drill bit and reduce the risk and cost of downhole tools.
Description
technical field [0001] The invention relates to the field of drilling control, in particular to an oil drilling constant pressure difference automatic drilling control method. Background technique [0002] During the drilling of horizontal wells and extended-reach wells, the frictional resistance is large and changes with time, so the WOB at the wellhead cannot reflect the WOB of the bottom hole bit, making it difficult to achieve constant pressure drilling; and because under normal working conditions The torque of the drill bit is approximately proportional to the WOB, so the actual WOB and torque of the drill bit are unstable, which affects the service life of the drill bit and the ROP. At present, downhole tools are generally used to reduce the drill bit torque and pressure-on-bit fluctuations of horizontal wells and extended-reach wells. This method has a short service life and high cost. [0003] A tool with constant drill bit torque is disclosed in the prior art. When...
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IPC IPC(8): E21B44/00G06N20/00
CPCE21B44/00G06N20/00
Inventor 缑柏弘钟晓明杭达震宋倩张辉峰
Owner 北京四利通控制技术股份有限公司